Firefighters were called to the blaze at the Food Lion in the 300 block of Mountain Road around 9 p.m. July 27.

Investigators said an illegal pyrotechnic device was put on a shelf in the store, and it ignited, sending smoke throughout the building.

Fire officials said witness accounts and surveillance video showed the culprits were two white boys who are about 14-15 years old and between 5 feet 6 inches to 5 feet 10 inches tall. One was wearing a black-and-white striped shirt with shorts, while the other was in a white T-shirt with some sort of design on the front.

Anyone who might be able to identify the teens should call fire investigators at 410-222-8477.